Silica mortar for hot blast furnace
Silica mortar is an indefinite refractory material used as a joint in refractory masonry. It is composed of refractory powder, binding agent and admixture in a certain particle ratio, and is mixed with water or liquid binding agent to form a slurry. Silica mortarusing silica powder or adding part of the silica powder as the main material. The binding agent can be soft clay or chemical binding agent.
Features: high bond strength, high refractoriness, excellent load softening performance, good construction performance.
Application: It is mainly used for masonry repair of hot air furnaces, coke ovens, glass kilns, acid melting furnaces, etc. and other industrial furnaces built with silica bricks.
| Projects | RGN-94 | JGN-92 | BGN-96 | GGN-94 |
| SiO2(%) | ≥94 | ≥92 | ≥96 | ≥94 |
| Flexural bonding strength 110C after drying(Mpa) | 1,0 | 1.0 | 0.8 | 0.5 |
| Flexural bonding strength 1400*C*3h after firing(Mpa) | 3.0 | 3.0 | 0.5 | 1.5 |
| Load softening temperature(0.2MPa) | 1600 | 1500 | 1620 | - |
| Particle size composition +0.5mm (%) | 1.0 | 3.0 | 2.0 | 3.0 |
| Particle size composition-0.074mm (%) | 60 | 50 | 60 | 50 |
| Bonding time(min) d | 1-2 | 1-2 | 2-3 | 1-2 |
| Fire resistance cone number (cone number) | 170 | 166 | 172 | 170 |
Silica mortar for coke ovens
Silica mortar for coke oven is made of natural high silica clay with SiO2 content >97%, and other auxiliary materials and special additives are added to make it.
Silica mortar for coke ovens is made of natural high-silica clay with SiO2 content >97% as the main raw material. The silica mortar has a natural dispersion fineness. At the same time, other auxiliary materials and special additives are added to make it.
Advantages:
1. Good construction performance, can ensure the appropriate masonry bonding time.
2. High temperature load bearing capacity and thermal stability coefficient are consistent with silicon brick, no fracture phenomenon, effectively prolonging the life of the furnace body.
Application: Silica mortar for coke oven is mainly used for the masonry of silica bricks in the coke oven body.
Performance index of silica mortar for coke ovens:
| Index | JGN-92 | JGN-85 |
| Fire resistance,℃ | 1660 | 1580 |
| Cold flexural bonding strength,MPa | 1 | 1 |
| Bonding time,min | 1~2 | 1~2 |
| Particle size composition,% | 3 | 3 |
| Chemical composition,% | 92 | 85 |
| 0.2MPa load softening temperature,℃ ≥ | 1500 | 1420 |
